UI-TARS 7B vs Devstral 2 2512
UI-TARS 7B costs 10.0x less per output token than Devstral 2 2512 ($0.20 vs $2.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.20
- Coding
- No data
- Overall
- No data
- Output $/M
- $2.00
UI-TARS 7B or Devstral 2 2512: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick UI-TARS 7B for output tokens 10.0x cheaper ($0.20 vs $2.00 per million).
No benchmark has tested both yet. UI-TARS 7B has results on Kagi LLM Benchmark; Devstral 2 2512 on SWE-bench Verified, AA Coding Index and LiveCodeBench (Vals AI). Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Devstral 2 2512 has a AA Intelligence Index result, 8.6.
Directional only
Agentic work
AA Agentic Index
No call
Only Devstral 2 2512 has a AA Agentic Index result, 2.3.
Directional only
Long documents
Listed context window
Devstral 2 2512
Devstral 2 2512 takes 262K tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
UI-TARS 7B
UI-TARS 7B $0.0002, Devstral 2 2512 $0.0014 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Devstral 2 2512 has the number, $1.19.
Directional only
At a glance
- Coding index
- UI-TARS 7B not benchmarked, Devstral 2 2512 not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- UI-TARS 7B $0.20 against Devstral 2 2512 $2.00 per million output tokens, 10.0x apart.
- Context window
- UI-TARS 7B takes 128K tokens, Devstral 2 2512 262K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index4 boards measured
| Benchmark | UI-TARS 7B | Devstral 2 2512 | Leader |
|---|---|---|---|
| SWE-bench Verified | Not measured | 53.8% | Only Devstral 2 2512 measured |
| AA Coding Index | Not measured | 31.3 | Only Devstral 2 2512 measured |
| LiveCodeBench (Vals AI) | Not measured | 51.8% | Only Devstral 2 2512 measured |
| SWE-bench Verified (Vals AI) | Not measured | 62.8% | Only Devstral 2 2512 measured |
| Neither model has a result on the other 35 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | UI-TARS 7B | Devstral 2 2512 | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 8.6 | Only Devstral 2 2512 measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | UI-TARS 7B | Devstral 2 2512 | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 2.3 | Only Devstral 2 2512 measured |
| Neither model has a result on the other 40 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | UI-TARS 7B | Devstral 2 2512 | Leader |
|---|---|---|---|
| Kagi LLM Benchmark | 20.7% | Not measured | Only UI-TARS 7B measured |
| Neither model has a result on the other 21 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
UI-TARS 7B costs less
Repository review
50K input + 3K output tokens
UI-TARS 7B costs less
Agent loop
200K input + 10K output tokens
UI-TARS 7B costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | ByteDance UI-TARS 7B | Mistral Devstral 2 2512 |
|---|---|---|
| Maker | ByteDance | Mistral AI |
| Weights | Open weights | Open weights |
| Released | July 22, 2025 | December 9, 2025 |
| Context window | 128K | 262K |
| Input $/Mtok | $0.10 | $0.40 |
| Output $/Mtok | $0.20 | $2.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 1 |
| Cost per solved task | Not computable | $1.19 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is UI-TARS 7B better than Devstral 2 2512 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick UI-TARS 7B for output tokens 10.0x cheaper ($0.20 vs $2.00 per million).
Which is cheaper, UI-TARS 7B or Devstral 2 2512?
UI-TARS 7B costs $0.10 per million input tokens and $0.20 per million output tokens; Devstral 2 2512 costs $0.40 and $2.00. Cost per solved task is known for Devstral 2 2512 only.
Which has the bigger context window, UI-TARS 7B or Devstral 2 2512?
Devstral 2 2512, with 262K tokens against 128K.
Has any benchmark tested both UI-TARS 7B and Devstral 2 2512?
No benchmark has tested both yet. UI-TARS 7B has results on Kagi LLM Benchmark; Devstral 2 2512 on SWE-bench Verified, AA Coding Index and LiveCodeBench (Vals AI). Compare them on price and context instead. Data as of October 21, 2026.